APA

G. Valk B., UCLA & Latin American Center Publications.HAPI. Hispanic American periodicals index. California: UCLA.

Chicago

G. Valk Barbara, UCLA and Latin American Center Publications.HAPI. Hispanic American periodicals index. California: UCLA.

Harvard

G. Valk B., UCLA and Latin American Center Publications.HAPI. Hispanic American periodicals index. California: UCLA.

MLA

G. Valk Barbara, UCLA and Latin American Center Publications.California: UCLA. .