APA
Collins J. L., Lutz C. A., . (1993). Reading national geographic. Chicago: University of Chicago Press.
Chicago
Collins Jane L, Lutz Catherine A, . 1993. Reading national geographic. Chicago: University of Chicago Press.
Harvard
Collins J. L., Lutz C. A., . (1993). Reading national geographic. Chicago: University of Chicago Press.
MLA
Collins Jane L, Lutz Catherine A, . Reading national geographic. Chicago: University of Chicago Press. 1993.