Cita APA (7th ed.)

Ferris, E., & Skelley, E. G. (1979). Body structures and functions.

Cita Chicago (17th ed.)

Ferris, Elvira, i Esther G. Skelley. Body Structures and Functions. 1979.

Cita MLA (9th ed.)

Ferris, Elvira, i Esther G. Skelley. Body Structures and Functions. 1979.