APA استشهاد

Holton,C.A, & Sheehan,J. (1993). Peterson graph. Cambridge University press.

استشهاد بنمط شيكاغو

Holton,C.A, و Sheehan,J. Peterson Graph. Cambridge: Cambridge University press, 1993.

MLA استشهاد

Holton,C.A, و Sheehan,J. Peterson Graph. Cambridge University press, 1993.