Dyfyniad APA

United States. Dept. of State, Burke, L. H., Herman, J. K., & Patterson, R. S. (1978). The Secretaries of State: Portraits and biographical sketches. Office of Public Communication, Bureau of Public Affairs.

Dyfyniad Arddull Chicago

United States. Dept. of State, Lee H. Burke, Jan K. Herman, and Richard Sharpe Patterson. The Secretaries of State: Portraits and Biographical Sketches. [Washington]: Office of Public Communication, Bureau of Public Affairs, 1978.

Dyfyniad MLA

United States. Dept. of State, et al. The Secretaries of State: Portraits and Biographical Sketches. Office of Public Communication, Bureau of Public Affairs, 1978.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.