APA استشهاد

Pittie, H. V. (1976). Characteristic classes of foliations. Pitman Pub..

استشهاد بنمط شيكاغو

Pittie, H. V. Characteristic Classes of Foliations. London: Pitman Pub., 1976.

MLA استشهاد

Pittie, H. V. Characteristic Classes of Foliations. Pitman Pub., 1976.