Παραπομπή APA

Lappert M.F. (1972). Main group elements: Hydrogen and groups I-IV. Butterworths.

Παραπομπή Chicago Style

Lappert M.F. Main Group Elements: Hydrogen and Groups I-IV. London: Butterworths, 1972.

Παραπομπή MLA

Lappert M.F. Main Group Elements: Hydrogen and Groups I-IV. Butterworths, 1972.