CASSIDY, J. .. a. (1987). Turn A Corner Jack Cassidy; Doris Roettger; Karent K. Wixson. Scribner Educational Publisers.
Lua i Stíl Chicago (17ú heag.)CASSIDY, Jack ..[et al.]. Turn A Corner Jack Cassidy; Doris Roettger; Karent K. Wixson. Scribner Educational Publisers, 1987.
Lua MLA (8ú heag.)CASSIDY, Jack ..[et al.]. Turn A Corner Jack Cassidy; Doris Roettger; Karent K. Wixson. Scribner Educational Publisers, 1987.
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