MAAN, Normah; YAACOB, Yusof. Kitaran Harga Dalam Industri Ternakan. MATEMATIKA, [S. l.], v. 10, p. 69–79, 1994. DOI: 10.11113/matematika.v10.n.54. Disponível em: https://matematika.utm.my/index.php/matematika/article/view/54. Acesso em: 6 may. 2024.