Citazione APA

WILLIS J.C. (1960). A DICTIONARY OF THE FLOWERING PLANTS AND FERNS (6.). CAMBRIDGE :AT THE UNIVERSITY PRESS.

Stile di citazione Chicago

WILLIS J.C. A DICTIONARY OF THE FLOWERING PLANTS AND FERNS. 6. USA: CAMBRIDGE :AT THE UNIVERSITY PRESS, 1960.

Citazione MLA

WILLIS J.C. A DICTIONARY OF THE FLOWERING PLANTS AND FERNS. 6. CAMBRIDGE :AT THE UNIVERSITY PRESS, 1960.