Παραπομπή APA

Gregoire, T. G., & Valentine, H. T. (2008). Sampling strategies for natural resources and the environment. Chapman & Hall.

Παραπομπή Chicago Style

Gregoire, Timothy G., και Harry T. Valentine. Sampling Strategies for Natural Resources and the Environment. London: Chapman & Hall, 2008.

Παραπομπή MLA

Gregoire, Timothy G., και Harry T. Valentine. Sampling Strategies for Natural Resources and the Environment. Chapman & Hall, 2008.