APA-viite (7. p.)
Harrison, W. F., & Welker, D. W. (1997). Intermediate Spanish memory book: A new approach to vocabulary building. University of Texas Press.
Chicago-viite (17. p.)
Harrison, William F., ja Dorothy Winters Welker. Intermediate Spanish Memory Book: A New Approach to Vocabulary Building. Austin: University of Texas Press, 1997.
MLA-viite (9. p.)
Harrison, William F., ja Dorothy Winters Welker. Intermediate Spanish Memory Book: A New Approach to Vocabulary Building. University of Texas Press, 1997.
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