Sykes, E. L. (1976). Arithmetic activities handbook: An individualized and group approach to teaching the basic skills. Parker Pub. Co..
Citace podle Chicago (17th ed.)Sykes, Edna L. Arithmetic Activities Handbook: An Individualized and Group Approach to Teaching the Basic Skills. West Nyack, N.Y.: Parker Pub. Co., 1976.
Citace podle MLA (8th ed.)Sykes, Edna L. Arithmetic Activities Handbook: An Individualized and Group Approach to Teaching the Basic Skills. Parker Pub. Co., 1976.
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