APA (7 ম সংস্করণ) উদ্ধৃতি

Birkeland, C. (1987). Comparison between Atlantic and Pacific tropical marine coastal ecosystems: Community structure, ecological processes and productivity. UNESCO-COMAR.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Birkeland, Charles. Comparison Between Atlantic and Pacific Tropical Marine Coastal Ecosystems: Community Structure, Ecological Processes and Productivity. París: UNESCO-COMAR, 1987.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Birkeland, Charles. Comparison Between Atlantic and Pacific Tropical Marine Coastal Ecosystems: Community Structure, Ecological Processes and Productivity. UNESCO-COMAR, 1987.