Não informado. (1953). Extracts from the proceedings of the Royal Horticultural Society. Royal Horticultural Society.
Chicago-referens (17:e uppl.)Não informado. Extracts from the Proceedings of the Royal Horticultural Society. London: Royal Horticultural Society, 1953.
MLA-referens (8:e uppl.)Não informado. Extracts from the Proceedings of the Royal Horticultural Society. Royal Horticultural Society, 1953.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.