Estandarte, H. P. (1972). Elementary school mathematics in the pineapple industry.
Cita Chicago (17th ed.)Estandarte, Herminia Plomillo. Elementary School Mathematics in the Pineapple Industry. 1972.
Cita MLA (9th ed.)Estandarte, Herminia Plomillo. Elementary School Mathematics in the Pineapple Industry. 1972.
Atenció: Aquestes cites poden no estar 100% correctes.