Koller, E. L. y. o. Black-And-Whit Technique.
Lua i Stíl Chicago (17ú heag.)Koller, E. L. y otro. Black-And-Whit Technique. U.S.A: International Textbook Company.
Lua MLA (8ú heag.)Koller, E. L. y otro. Black-And-Whit Technique.
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