State of the industry, 2012: ASTD's annual review of workplace learning and development data
ASTD Press, 2012
 eBooks
Leigh, Elyssebeth
Fun & games for workplace learning
McGraw-Hill, 2001
 Multimedia
Leigh, Elyssebeth
Fun and games for workplace learning
McGraw-Hill, 2001
 Buku Teks SO
India annual Review
1962
 Buku Teks
Annual review of population law
United Nations Population Fund; edited by Reed Boland
United Nations Population Fund and Harvard Law School Library , 1986
 Buku Teks SO