Dorling Kindersley, I. (2005). 15-minute German: Learn German in just 15 minutes a day. New York, NY: Dorling Kindersley, Inc.
シカゴスタイル引用形Dorling Kindersley, Inc. 15-minute German: Learn German in Just 15 Minutes a Day. New York, NY: Dorling Kindersley, Inc, 2005.
MLA引用形式Dorling Kindersley, Inc. 15-minute German: Learn German in Just 15 Minutes a Day. New York, NY: Dorling Kindersley, Inc, 2005.
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