Cita APA (7th ed.)

Goodrich, F. W. (1950). Natural childbirth: A manual for expectant parents. Prentice-Hall.

Cita Chicago (17th ed.)

Goodrich, Frederick W. Natural Childbirth: A Manual for Expectant Parents. Englewood Cliffs, N.J: Prentice-Hall, 1950.

Cita MLA (9th ed.)

Goodrich, Frederick W. Natural Childbirth: A Manual for Expectant Parents. Prentice-Hall, 1950.