Perkin, H. (1970). History: Introduction for the intending student. RKP.
Chicago Style aipamenaPerkin, Harold. History: Introduction for the Intending Student. London: RKP, 1970.
MLA aipamenaPerkin, Harold. History: Introduction for the Intending Student. RKP, 1970.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.