APA (7 ম সংস্করণ) উদ্ধৃতি

Hellgren, M. (1995). Gremmeniella abietina: Disease biology and genetic variation within Fennoscandia. Sveriges lantbruksuniversitet.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Hellgren, Magnus. Gremmeniella Abietina: Disease Biology and Genetic Variation Within Fennoscandia. Uppsala: Sveriges lantbruksuniversitet, 1995.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Hellgren, Magnus. Gremmeniella Abietina: Disease Biology and Genetic Variation Within Fennoscandia. Sveriges lantbruksuniversitet, 1995.