APA (7th ed.) Citation

Pearl, R. (1927). The cost of biological books in 1927. s.n..

Chicago Style (17th ed.) Citation

Pearl, Raymond. The Cost of Biological Books in 1927. [Baltimore: s.n., 1927.

MLA (8th ed.) Citation

Pearl, Raymond. The Cost of Biological Books in 1927. s.n., 1927.

Warning: These citations may not always be 100% accurate.