Cita APA (7th ed.)

Barrington, E. J. W. (1965). The biology of Hemichordata and Protochordata. W. H. Freeman.

Cita Chicago (17th ed.)

Barrington, E. J. W. The Biology of Hemichordata and Protochordata. San Francisco: W. H. Freeman, 1965.

Cita MLA (9th ed.)

Barrington, E. J. W. The Biology of Hemichordata and Protochordata. W. H. Freeman, 1965.