Cita APA (7th ed.)

Whitton, B., Rott, E., & Friedrich, G. (1991). Use of algae for monitoring rivers. Institut fur Botanik.

Cita Chicago (17th ed.)

Whitton, B.A, E. Rott, i G. Friedrich. Use of Algae for Monitoring Rivers. Austria: Institut fur Botanik, 1991.

Cita MLA (9th ed.)

Whitton, B.A, et al. Use of Algae for Monitoring Rivers. Institut fur Botanik, 1991.