Gaya APA

A question of maths: Substraction. (2005). London: Brown Reference Group.

Gaya Chicago

A question of maths: Substraction. . London: Brown Reference Group, 2005. Buku.

Gaya MLA

A question of maths: Substraction. . London: Brown Reference Group, 2005. Buku.

Gaya Turabian

A question of maths: Substraction. London: Brown Reference Group, 2005. Buku.