APA (7e ed.) Bronvermelding

Libres, M. R. (2003). The calcium content of the leaves of six common local weeds. Graduate and Faculty Studies.

Chicago (17e ed.) Bronvermelding

Libres, Myrna R. "The Calcium Content of the Leaves of Six Common Local Weeds." Graduate and Faculty Studies 2003.

MLA (9e ed.) Bronvermelding

Libres, Myrna R. "The Calcium Content of the Leaves of Six Common Local Weeds." Graduate and Faculty Studies, 2003.