APA-viite

Kass, D. (1981). Vegetables suitable for association with subsistence maize and beans in the highlands of Guatemala.

Chicago-tyylinen lähdeviittaus

Kass, D.C.L. Vegetables Suitable for Association With Subsistence Maize and Beans in the Highlands of Guatemala. 1981.

MLA-viite

Kass, D.C.L. Vegetables Suitable for Association With Subsistence Maize and Beans in the Highlands of Guatemala. 1981.

Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.