APA

Stirton R. A., . (1967). Relationships of the Protoceratid Artiodactyls and description of a new genus. Berkeley [u.a.]: Univ. of California Press.

Chicago

Stirton Ruben A, . 1967. Relationships of the Protoceratid Artiodactyls and description of a new genus. Berkeley [u.a.]: Univ. of California Press.

Harvard

Stirton R. A., . (1967). Relationships of the Protoceratid Artiodactyls and description of a new genus. Berkeley [u.a.]: Univ. of California Press.

MLA

Stirton Ruben A, . Relationships of the Protoceratid Artiodactyls and description of a new genus. Berkeley [u.a.]: Univ. of California Press. 1967.