APA

Portmann A., . (1964). New paths in biology. New York: Harper & Row.

Chicago

Portmann Adolf, . 1964. New paths in biology. New York: Harper & Row.

Harvard

Portmann A., . (1964). New paths in biology. New York: Harper & Row.

MLA

Portmann Adolf, . New paths in biology. New York: Harper & Row. 1964.