APA استشهاد

Johnson, R. C. (1949). An introduction to molecular spectra. Methuen.

استشهاد بنمط شيكاغو

Johnson, Raynor Carey. An Introduction to Molecular Spectra. London: Methuen, 1949.

MLA استشهاد

Johnson, Raynor Carey. An Introduction to Molecular Spectra. Methuen, 1949.