APA (7e ed.) Bronvermelding

Watkins, R. J. (1967). Expanding Ecuador's exports: A commodity-by-commodity study with projections to 1973. F. A. Praeger.

Chicago (17e ed.) Bronvermelding

Watkins, Ralph J. Expanding Ecuador's Exports: A Commodity-by-commodity Study with Projections to 1973. New York: F. A. Praeger, 1967.

MLA (8e ed.) Bronvermelding

Watkins, Ralph J. Expanding Ecuador's Exports: A Commodity-by-commodity Study with Projections to 1973. F. A. Praeger, 1967.