APA (7th ed.) Citation

Heilman, R. B., Voegelin, E., & Embry, C. R. (2004). Robert B. Heilman and Eric Voegelin: A friendship in letters, 1944-1984. University of Missouri Press.

Chicago Style (17th ed.) Citation

Heilman, Robert Bechtold, Eric Voegelin, and Charles R. Embry. Robert B. Heilman and Eric Voegelin: A Friendship in Letters, 1944-1984. Columbia: University of Missouri Press, 2004.

MLA (8th ed.) Citation

Heilman, Robert Bechtold, et al. Robert B. Heilman and Eric Voegelin: A Friendship in Letters, 1944-1984. University of Missouri Press, 2004.