APA (7e ed.) Bronvermelding

Huerta, E., Valier, O., Romero, D., & Jarquin, A. (2010). Effect off three earthworm species on soil fertility and the growth of maize (Zea mays) seedlings. Instituto de Ecología, A.C.

Chicago (17e ed.) Bronvermelding

Huerta, Esperanza, Olivia Valier, Day Romero, en Aaron Jarquin. Effect off Three Earthworm Species on Soil Fertility and the Growth of Maize (Zea Mays) Seedlings. Instituto de Ecología, A.C, 2010.

MLA (9e ed.) Bronvermelding

Huerta, Esperanza, et al. Effect off Three Earthworm Species on Soil Fertility and the Growth of Maize (Zea Mays) Seedlings. Instituto de Ecología, A.C, 2010.