APA

Huettner A. F., . (1941). Fundamentals of comparative embryology of the vertebrates. New York: Macmillan company.

Chicago

Huettner Alfred Francis, . 1941. Fundamentals of comparative embryology of the vertebrates. New York: Macmillan company.

Harvard

Huettner A. F., . (1941). Fundamentals of comparative embryology of the vertebrates. New York: Macmillan company.

MLA

Huettner Alfred Francis, . Fundamentals of comparative embryology of the vertebrates. New York: Macmillan company. 1941.