Cita APA (7th ed.)

LEFFINGWELL W H. (1982). TEXTBOOK OF OFFICE MANAGEMENT (3RD.). TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.

Cita Chicago (17th ed.)

LEFFINGWELL W H. TEXTBOOK OF OFFICE MANAGEMENT. 3RD. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1982.

Cita MLA (9th ed.)

LEFFINGWELL W H. TEXTBOOK OF OFFICE MANAGEMENT. 3RD. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1982.