Clark, O. E. J. (1971). Chemistry. Hamlyn.
Chicago Style aipamenaClark, O E John. Chemistry. London: Hamlyn, 1971.
MLA aipamenaClark, O E John. Chemistry. Hamlyn, 1971.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
Clark, O. E. J. (1971). Chemistry. Hamlyn.
Chicago Style aipamenaClark, O E John. Chemistry. London: Hamlyn, 1971.
MLA aipamenaClark, O E John. Chemistry. Hamlyn, 1971.