APA Style

Ridsdale, C, E. (1970). The Arborescent Naucleae of New Guinea and Solomon Islands (Rubiaceae) - Vol. XXV (2) . Gardens’ Bulletin, Singapore: .

MLA Style

Ridsdale, C., E.. "The Arborescent Naucleae of New Guinea and Solomon Islands (Rubiaceae) - Vol. XXV (2)". Gardens’ Bulletin, Singapore: , 1970. Text.