Proceedings of the third world orchid conference, ..., held in London 1960.

MLA

Proceedings of the Third World Orchid Conference, ..., Held In London 1960. London: Royal Horticultural Society, 1960.

APA

(1960). Proceedings of the third world orchid conference, ..., held in London 1960. London: Royal Horticultural Society.

Chicago

Proceedings of the Third World Orchid Conference, ..., Held In London 1960. London: Royal Horticultural Society, 1960.