APA (7 ম সংস্করণ) উদ্ধৃতি

Bowen, Z. P. (1967). Brachiopoda of the Keyser Limestone (Silurian-Devonian) of Maryland and adjacent areas. Geological Society of America.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Bowen, Zeddie Paul. Brachiopoda of the Keyser Limestone (Silurian-Devonian) of Maryland and Adjacent Areas. [New York]: Geological Society of America, 1967.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Bowen, Zeddie Paul. Brachiopoda of the Keyser Limestone (Silurian-Devonian) of Maryland and Adjacent Areas. Geological Society of America, 1967.