APA (7th ed.) Citation

Legendre, P., & Legendre, L. (1998). Numerical ecology (2a. ed.). Elsevier.

Chicago Style (17th ed.) Citation

Legendre, Pierre, and Louis Legendre. Numerical Ecology. 2a. ed. Amsterdam: Elsevier, 1998.

MLA (9th ed.) Citation

Legendre, Pierre, and Louis Legendre. Numerical Ecology. 2a. ed. Elsevier, 1998.