by Delbert S. Elliott ...[et al.]
Cambridge University Press, 2007
Buku Teks
Maria Pina Limongelli, Mehmet Celebi, editors
Springer Fachmedien Wiesbaden, 2019
eBooks
Dreitzel, Hans Peter
MacMillan Press , 1971
Buku Teks
International Labour Office, 1999
Buku Teks
edited by Henry Wechsler, Leonard Solomon, Bernard M. Kramer
Holt, Rinehart and Winston, 1970
Buku Teks