Gaya APA

ZEMKE, K, A, &, R. (1998). Delivering Knock Your Socks Off Service (Cet.1). NEW YORK: AMACOM.

Gaya MLA

ZEMKE, KRISTIN, ANDERSON, &, RON. "Delivering Knock Your Socks Off Service". Cet.1 NEW YORK: AMACOM, 1998. Text.