Cita APA (7a ed.)

Sims, R., & Gerard, B. (1985). Earthworms: Keys and notes for the identification and study of the species. Brill [etc.].

Cita Chicago Style (17a ed.)

Sims, R.W, y B.M Gerard. Earthworms: Keys and Notes for the Identification and Study of the Species. London [etc.]: Brill [etc.], 1985.

Cita MLA (9a ed.)

Sims, R.W, y B.M Gerard. Earthworms: Keys and Notes for the Identification and Study of the Species. Brill [etc.], 1985.