Bibliografi : hlm. 235-240 No Inv.: 142443-142447/P/Perp/14/5c
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Bibliografi : hlm. 359-378 No Inv.: 133588/SM/Perp/12/1c~140612/SM/Perp/14/1c; Bibliografi : hlm. 359-378; Judul Asli : Research design : qualitative, quantitative and mixed methods approaches
Bibliografi : hlm. 1310-1342
Bibliografi : hlm. 177-181
Bibliografi : hlm. 186-187
Bibliografi : hlm. 173-174 No Inv.: 130456/SM/Perp/12/1c
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Bibliografi : hlm. 344-347