APA

KIRN E., HARTMANN P., .A READING SKILLS BOOK. MEXICO: MCGRAW-HILL.

Chicago

KIRN ELAINE, HARTMANN PAMELA, .A READING SKILLS BOOK. MEXICO: MCGRAW-HILL.

Harvard

KIRN E., HARTMANN P., .A READING SKILLS BOOK. MEXICO: MCGRAW-HILL.

MLA

KIRN ELAINE, HARTMANN PAMELA, .MEXICO: MCGRAW-HILL. .