Gaya APA
West, E. (1997).
201 Icebreakers : Group MIxers, Warm-Ups, Energizers, and Playful Activities (First Edition).
usa:
McGraw Hill.
Gaya MLA
West, Edie.
"201 Icebreakers : Group MIxers, Warm-Ups, Energizers, and Playful Activities".
First Edition
usa:
McGraw Hill,
1997.
Buku.