Cita APA (7th ed.)

Witschi, E. (1956). Development of vertebrates. W.B.Saunders.

Cita Chicago (17th ed.)

Witschi, Emil. Development of Vertebrates. Filadelfia: W.B.Saunders, 1956.

Cita MLA (9th ed.)

Witschi, Emil. Development of Vertebrates. W.B.Saunders, 1956.