Lougheed, L. (2021). Barron's IELTS (Fourth edition.). Kaplan, Inc., d/b/a Barron's Educational Series.
Chicagoスタイル(17版)引用形式Lougheed, Lin. Barron's IELTS. Fourth edition. New York, NY: Kaplan, Inc., d/b/a Barron's Educational Series, 2021.
MLA(9版)引用形式Lougheed, Lin. Barron's IELTS. Fourth edition. Kaplan, Inc., d/b/a Barron's Educational Series, 2021.
警告: この引用は必ずしも正確ではありません.