Παραπομπή APA

Bragg, W. L. E., & Porter, G. E. (1970). Physical sciences.

Παραπομπή Chicago Style

Bragg, William Lawrence; Ed, και George; Ed Porter. Physical Sciences. England, Elsevier, 1970.

Παραπομπή MLA

Bragg, William Lawrence; Ed, και George; Ed Porter. Physical Sciences. 1970.