APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.