APA

Stanford University, . (1987). Update. Palo Alto (California, EE.UU.): Center for Conservation Biology.

Chicago

Stanford University, . 1987. Update. Palo Alto (California, EE.UU.): Center for Conservation Biology.

Harvard

Stanford University, . (1987). Update. Palo Alto (California, EE.UU.): Center for Conservation Biology.

MLA

Stanford University, . Update. Palo Alto (California, EE.UU.): Center for Conservation Biology. 1987.