APA (7th ed.) Citation

Breimer, R. F., Van Kekem, A. J., & Reuler, H. v. (1986). Guidelines for soil survey and land evaluation in ecological research. Unesco.

Chicago Style (17th ed.) Citation

Breimer, R. F., A. J. Van Kekem, and H. van Reuler. Guidelines for Soil Survey and Land Evaluation in Ecological Research. Paris: Unesco, 1986.

MLA (9th ed.) Citation

Breimer, R. F., et al. Guidelines for Soil Survey and Land Evaluation in Ecological Research. Unesco, 1986.