APA

Richards J. C., Sandy C., . (2000). Passages. An upper-level multi-skills course. New York: Cambridge University Press.

Chicago

Richards J C, Sandy Ch, . 2000. Passages. An upper-level multi-skills course. New York: Cambridge University Press.

Harvard

Richards J. C., Sandy C., . (2000). Passages. An upper-level multi-skills course. New York: Cambridge University Press.

MLA

Richards J C, Sandy Ch, . Passages. An upper-level multi-skills course. New York: Cambridge University Press. 2000.