Lua APA (7ú heag.)

Hughes, J. K. (1973). PL. Wiley.

Lua i Stíl Chicago (17ú heag.)

Hughes, Joan Kirby. PL. New York: Wiley, 1973.

Lua MLA (9ú heag.)

Hughes, Joan Kirby. PL. Wiley, 1973.

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