Παραπομπή σε μορφή APA (7η εκδ.)

LEFTWICH, R. H. (1984). Student's Workbook And Study Guide To Accompany A Basic Framework For Economics Ricard H. Letfwich; De Von L. Yoho. Business Publications.

Παραπομπή σε μορφή Chicago (17η εκδ.)

LEFTWICH, Richard H. Student's Workbook And Study Guide To Accompany A Basic Framework For Economics Ricard H. Letfwich; De Von L. Yoho. Business Publications, 1984.

Παραπομπή σε μορφή MLA (8th εκδ.)

LEFTWICH, Richard H. Student's Workbook And Study Guide To Accompany A Basic Framework For Economics Ricard H. Letfwich; De Von L. Yoho. Business Publications, 1984.