APA (7e ed.) Bronvermelding

Leftwich, V. P. (1971). Waters of the earth. Milliken.

Chicago (17e ed.) Bronvermelding

Leftwich, Virginia Powers. Waters of the Earth. St. Louis, Mo: Milliken, 1971.

MLA (9e ed.) Bronvermelding

Leftwich, Virginia Powers. Waters of the Earth. Milliken, 1971.