Cita APA

Whitford, L., & Schumacher, G. (1973). A manual of fresh water algae. Raleigh, NC: Sparks Press.

Citación estilo Chicago

Whitford, L.A., y G.J Schumacher. A Manual of Fresh Water Algae. Raleigh, NC: Sparks Press, 1973.

Cita MLA

Whitford, L.A., y G.J Schumacher. A Manual of Fresh Water Algae. Raleigh, NC: Sparks Press, 1973.