APA

Bales R. F., Cohen S. P. & Williamson S. A. (1979). SYMLOG: a system for the multiple level observation of groups. New York: Free Press.

Chicago

Bales Robert Freed, Cohen Stephen P and Williamson Stephen A. 1979. SYMLOG: a system for the multiple level observation of groups. New York: Free Press.

Harvard

Bales R. F., Cohen S. P. and Williamson S. A. (1979). SYMLOG: a system for the multiple level observation of groups. New York: Free Press.

MLA

Bales Robert Freed, Cohen Stephen P and Williamson Stephen A. SYMLOG: a system for the multiple level observation of groups. New York: Free Press. 1979.