APA

Cowan I. M., . (1935). A distributional study of the Peromyscus sitkensis group of white-footed mice. Berkeley, Calif: University of California Press.

Chicago

Cowan Ian McT, . 1935. A distributional study of the Peromyscus sitkensis group of white-footed mice. Berkeley, Calif: University of California Press.

Harvard

Cowan I. M., . (1935). A distributional study of the Peromyscus sitkensis group of white-footed mice. Berkeley, Calif: University of California Press.

MLA

Cowan Ian McT, . A distributional study of the Peromyscus sitkensis group of white-footed mice. Berkeley, Calif: University of California Press. 1935.