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Pitman , 1974
Buku Teks
Amaresh Chakrabarti, editor
Springer Nature, 2019
eBooks
Weissermel
VCH, 1993
Buku Teks
Wakefield, Sarah, author
American Society for Training & Development, 2011
eBooks
Endah Winarni, author
Research and development center for family planning and family welfare, national family planning and population board, Jakarta, Indonesia, 2016
Artikel Jurnal