Παραπομπή APA

Ballard, R. E. (1978). Photoelectron spectroscopy and molecular orbital theory. A. Hilger.

Παραπομπή Chicago Style

Ballard, R. E. Photoelectron Spectroscopy and Molecular Orbital Theory. Bristol [Eng.]: A. Hilger, 1978.

Παραπομπή MLA

Ballard, R. E. Photoelectron Spectroscopy and Molecular Orbital Theory. A. Hilger, 1978.