APA

Vries P. G. d., . (1989). Sampling theory for forest inventory. New York: Springer-Verlag.

Chicago

Vries Pieter G de, . 1989. Sampling theory for forest inventory. New York: Springer-Verlag.

Harvard

Vries P. G. d., . (1989). Sampling theory for forest inventory. New York: Springer-Verlag.

MLA

Vries Pieter G de, . Sampling theory for forest inventory. New York: Springer-Verlag. 1989.