Gaya APA

Owen, D, T. (1993). Reseacrh ideas for the classroom middle grades mathematics (Cet.1). sl: The National Council of Teachers of Mathematics.

Gaya MLA

Owen, Douglas, T. "Reseacrh ideas for the classroom middle grades mathematics". Cet.1 sl: The National Council of Teachers of Mathematics, 1993. Buku Tercetak.