ÇAKALLI, D. dhe E. KULLAJ (2007) Biology of Horticultural Crops. 510 pg. [textbook in Albanian]

KULLAJ, E. dhe D. ÇAKALLI (2007) Laboratory Topics in Biology of Horticultural Crops. 250 pg. https://sites.google.com/a/ubt.edu.al/biologjia-bimeve-hortikulturore/ 

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KULLAJ, E. (2020). Environmental Physiology for Fruit Trees (two volumes). 810 pg. [lecture notes in Albanian]

KULLAJ, E. (2008). Fruit Tree Ecophysiology. 540 pg. [lecture notes in Albanian]

KULLAJ, E. (2008). Advance Biology of Fruit Trees, 310 pg. [lecture notes in Albanian] https://sites.google.com/a/ubt.edu.al/ekofiziologjia-e-drufrutoreve/

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KULLAJ, E. (2016). Fruit Breeding – Conventional and Molecular Methods. 310 pg. [lecture notes in Albanian]

KULLAJ, E. (2012) Molecular Methods in Fruit Breeding. 450 pg [lecture notes in Albanian]

KULLAJ, E. (2009) Fruit Breeding (Crop by Crop). 789 pg.  [lecture notes in Albanian] https://sites.google.com/a/ubt.edu.al/permiresimi-i-pemeve/ 

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KULLAJ, E. (2017). Fruit Production Technologies. 350 pg. [lecture notes in Albanian]

https://sites.google.com/a/ubt.edu.al/bazat-e-pemtarise/ 

https://sites.google.com/a/ubt.edu.al/teknologjite-e-kultivimit-ne-pemetari/

KULLAJ, E. (2016) Organic Herb Production – a route to sustainable development of rural Albania

http://consus.allafine.com/en/modules/view/261.Organic-Herb-Production-a-route-to-sustainable-development-of-rural-Albania/en

KULLAJ, E. (2009). Organic Fruit Growing, AUT 200 pg. [lecture notes in Albanian]