APA

Downing J. A., Rigler F. H. & Downing J. A. (1984). A manual of methods for the assessment of secondary productivity in fresh waters. Oxford [u.a.]: Blackwell.

Chicago

Downing J A, Rigler F H and Downing John A. 1984. A manual of methods for the assessment of secondary productivity in fresh waters. Oxford [u.a.]: Blackwell.

Harvard

Downing J. A., Rigler F. H. and Downing J. A. (1984). A manual of methods for the assessment of secondary productivity in fresh waters. Oxford [u.a.]: Blackwell.

MLA

Downing J A, Rigler F H and Downing John A. A manual of methods for the assessment of secondary productivity in fresh waters. Oxford [u.a.]: Blackwell. 1984.