Gill, R. J. (1988). The scale insects of California. California Department of Food and Agriculture.
Citazione stile Chigago Style (17a edizione)Gill, Raymond J. The Scale Insects of California. Sacramento, California, USA: California Department of Food and Agriculture, 1988.
Citatione MLA (9a ed.)Gill, Raymond J. The Scale Insects of California. California Department of Food and Agriculture, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.