Irawanti, Pungki. “Trade Practices in Koto VII Basambilan Koto, Sijunjung (1980-1998)”. Jurnal Ceteris Paribus 3, no. 2 (September 30, 2024): 1–9. Accessed November 6, 2024. http://jcp.fib.unand.ac.id/index.php/jcepe/article/view/31.