Não informado. (1973). Annual journal. Royal New Zealand Institute of Horticulture.
Chicago-viite (17. p.)Não informado. Annual Journal. Christchurch, Nova Zelandia: Royal New Zealand Institute of Horticulture, 1973.
MLA-viite (8. p.)Não informado. Annual Journal. Royal New Zealand Institute of Horticulture, 1973.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.