APA استشهاد

Childs, W. H. J. (1972). Physical constants (9th ed.). Chapman & Hall.

استشهاد بنمط شيكاغو

Childs, W H J. Physical Constants. 9th ed. London: Chapman & Hall, 1972.

MLA استشهاد

Childs, W H J. Physical Constants. 9th ed. Chapman & Hall, 1972.