Citazione APA

Gulland, M. E. J., & Mace, R. (1998). Conservation of biological resources.

Stile di citazione Chicago

Gulland, Milner E J., e Ruth Mace. Conservation of Biological Resources. London, Blackwell science, 1998.

Citazione MLA

Gulland, Milner E J., e Ruth Mace. Conservation of Biological Resources. 1998.