APA

Richards I. A., Metcalf R. C. & Gibson C. (1960). Spanish through pictures. New York: Washington Square Press.

Chicago

Richards Ivor Armstrong, Metcalf Ruth C and Gibson Christine. 1960. Spanish through pictures. New York: Washington Square Press.

Harvard

Richards I. A., Metcalf R. C. and Gibson C. (1960). Spanish through pictures. New York: Washington Square Press.

MLA

Richards Ivor Armstrong, Metcalf Ruth C and Gibson Christine. Spanish through pictures. New York: Washington Square Press. 1960.