ROBERTS-PHELPS GRAHAM. (2000). SALES TRAINING GAMES. GOWER.
Chicagoスタイル(17版)引用形式ROBERTS-PHELPS GRAHAM. SALES TRAINING GAMES. U S A: GOWER, 2000.
MLA(9版)引用形式ROBERTS-PHELPS GRAHAM. SALES TRAINING GAMES. GOWER, 2000.
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APA(7版)引用形式