Bibliografi : hlm. 337-347 No Inv.: 130471/SM/Perp/12/1c
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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
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Bibliografi : hlm. 405 No Inv.: 111222-111224/P/Perp/07/3c~127886-127890/P/Perp/10/5c~144263/Sm/Perp/14/1c
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Bibliografi : hlm. 168179
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Bibliografi : lembar 240-241