APA

Dale B., Roeber J., . (1982). The pregnancy exercise book. New York: Pantheon Books.

Chicago

Dale Bárbara, Roeber Johanna, . 1982. The pregnancy exercise book. New York: Pantheon Books.

Harvard

Dale B., Roeber J., . (1982). The pregnancy exercise book. New York: Pantheon Books.

MLA

Dale Bárbara, Roeber Johanna, . The pregnancy exercise book. New York: Pantheon Books. 1982.