Cita APA (7th ed.)

Downing, J. A., & Rigler, F. H. (1984). A manual on methods for the assessment of secondary productivity in fresh waters (2a. ed.). Blackwell Scientific.

Cita Chicago (17th ed.)

Downing, John A., i Frank H. Rigler. A Manual on Methods for the Assessment of Secondary Productivity in Fresh Waters. 2a. ed. Oxford: Blackwell Scientific, 1984.

Cita MLA (9th ed.)

Downing, John A., i Frank H. Rigler. A Manual on Methods for the Assessment of Secondary Productivity in Fresh Waters. 2a. ed. Blackwell Scientific, 1984.