Cita APA (7th ed.)

Smallwood, W. L., & Green, E. R. (1974). Biology. Silver Burdett.

Cita Chicago (17th ed.)

Smallwood, William L., i Edna R. Green. Biology. Morristown: Silver Burdett, 1974.

Cita MLA (9th ed.)

Smallwood, William L., i Edna R. Green. Biology. Silver Burdett, 1974.