APA

Gregory P. R., . (1994). Before command. Princeton, NJ u.a: Princeton Univ. Press.

Chicago

Gregory Paul R, . 1994. Before command. Princeton, NJ u.a: Princeton Univ. Press.

Harvard

Gregory P. R., . (1994). Before command. Princeton, NJ u.a: Princeton Univ. Press.

MLA

Gregory Paul R, . Before command. Princeton, NJ u.a: Princeton Univ. Press. 1994.