Gaya APA

Swanson, C, P., F...[et.al], I, S, H. (NULL). Elementary mathematics 5 concepts, properties, and operations . St.: .

Gaya MLA

Swanson, Carl, P.., F...[et.al], I., Spitzer,, Herbert. "Elementary mathematics 5 concepts, properties, and operations". St.: , NULL. Text.