Paul Randolph E.
Little, Brown & Co., 1954
Buku Teks
Bourne, Randolph
Huetsch , 1920
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Quirk, Randolph
English Language Book Society/Longman, 1989
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Winkler, John W.
A Voon Book Division, 1972
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Stephen A. Ross
Irwin/McGraw-Hill, 1999
Buku Teks