Cita APA (7th ed.)

SPERLING, A. a. S. (1967). Mathematics made simple. W.H.Allen.

Cita Chicago (17th ed.)

SPERLING, Abraham and STUART. Mathematics Made Simple. London: W.H.Allen, 1967.

Cita MLA (9th ed.)

SPERLING, Abraham and STUART. Mathematics Made Simple. W.H.Allen, 1967.