Cita APA (7a ed.)

Willmer, P. (1990). Invertebrate relationships: Patterns in animal evolution. University Press.

Cita Chicago Style (17a ed.)

Willmer, Pat. Invertebrate Relationships: Patterns in Animal Evolution. Cambridge, Mass.: University Press, 1990.

Cita MLA (8a ed.)

Willmer, Pat. Invertebrate Relationships: Patterns in Animal Evolution. University Press, 1990.