WATCYN-JONES, P. (1986). Test your vocabulary book 4. Penguin Books.
Chicagoスタイル(17版)引用形式WATCYN-JONES, Peter. Test Your Vocabulary Book 4. Harmonsworth: Penguin Books, 1986.
MLA(9版)引用形式WATCYN-JONES, Peter. Test Your Vocabulary Book 4. Penguin Books, 1986.
警告: この引用は必ずしも正確ではありません.