Cita APA (7a ed.)

Copeland, R. M., & Fredericks, W. (1968). Extent of disclosure. [s.n.].

Cita Chicago Style (17a ed.)

Copeland, Ronald M., y William Fredericks. Extent of Disclosure. [S.l.]: [s.n.], 1968.

Cita MLA (9a ed.)

Copeland, Ronald M., y William Fredericks. Extent of Disclosure. [s.n.], 1968.