APA-viite

Joy, P. J. (1978). Ecology and control of salvinia: African payal, the kolesting weed of Kerala( Filicales).

Chicago-tyylinen lähdeviittaus

Joy, P J. Ecology and Control of Salvinia: African Payal, the Kolesting Weed of Kerala( Filicales). Thrissur, Kerala Agricultural University, 1978.

MLA-viite

Joy, P J. Ecology and Control of Salvinia: African Payal, the Kolesting Weed of Kerala( Filicales). 1978.