APA

Gilchrist F. G., . (1968). A survey of embryology. New York: McGraw-Hill.

Chicago

Gilchrist Francis G, . 1968. A survey of embryology. New York: McGraw-Hill.

Harvard

Gilchrist F. G., . (1968). A survey of embryology. New York: McGraw-Hill.

MLA

Gilchrist Francis G, . A survey of embryology. New York: McGraw-Hill. 1968.