APA (7th ed.) Citation

Sobel, R. (1977). Biographical directory of the United States executive branch, 1774-1977. Greenwood Press.

Chicago Style (17th ed.) Citation

Sobel, Robert. Biographical Directory of the United States Executive Branch, 1774-1977. Westport, Conn.: Greenwood Press, 1977.

MLA (9th ed.) Citation

Sobel, Robert. Biographical Directory of the United States Executive Branch, 1774-1977. Greenwood Press, 1977.

Warning: These citations may not always be 100% accurate.