APA (7 ম সংস্করণ) উদ্ধৃতি

Johnston, D. M. (1981). The environmental law of the sea. International Union for Conservation of Nature and Natural Resources.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Johnston, Douglas M. The Environmental Law of the Sea. Lausana: International Union for Conservation of Nature and Natural Resources, 1981.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Johnston, Douglas M. The Environmental Law of the Sea. International Union for Conservation of Nature and Natural Resources, 1981.