Não informado. (1953). Extracts from the proceedings of the Royal Horticultural Society. Royal Horticultural Society.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Extracts from the Proceedings of the Royal Horticultural Society. London: Royal Horticultural Society, 1953.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Extracts from the Proceedings of the Royal Horticultural Society. Royal Horticultural Society, 1953.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.