PURWANTO, Sugeng. Analisis Karakteristik Kolektor dan Proses Pembelian Batu Akik dengan Pendekatan Leisure Study. Jurnal Maksipreneur: Manajemen, Koperasi, dan Entrepreneurship, [S. l.], v. 7, n. 1, p. 31–47, 2017. DOI: 10.30588/jmp.v7i1.321. Disponível em: https://ejournal.up45.ac.id/index.php/maksipreneur/article/view/321. Acesso em: 1 sep. 2024.