APA-referens (7:e uppl.)

Não informado. (1969). Progressive Horticulture. Hill Horticulture Development Board, Horticultural Experiments and Training.

Chicago-referens (17:e uppl.)

Não informado. Progressive Horticulture. Chaubattia, India: Hill Horticulture Development Board, Horticultural Experiments and Training, 1969.

MLA-referens (8:e uppl.)

Não informado. Progressive Horticulture. Hill Horticulture Development Board, Horticultural Experiments and Training, 1969.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.