APA-viite

Ferreira, A., & Vale, C. (2001). Seasonal and inter-annual variations of PCB and DDT contents in the oyster Crassostrea angulata from the Sado Estuary (Portugal). Iniversidad Autónoma de Baja California.

Chicago-tyylinen lähdeviittaus

Ferreira, AM, ja C. Vale. Seasonal and Inter-annual Variations of PCB and DDT Contents in the Oyster Crassostrea Angulata From the Sado Estuary (Portugal). Iniversidad Autónoma de Baja California, 2001.

MLA-viite

Ferreira, AM, ja C. Vale. Seasonal and Inter-annual Variations of PCB and DDT Contents in the Oyster Crassostrea Angulata From the Sado Estuary (Portugal). Iniversidad Autónoma de Baja California, 2001.

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