See Allo

Wachner, Clarence W., author

Macmillan, 1963

Buku Teks

Duke University Press,

Majalah, Jurnal, Buletin

Short, Raymond W., author

Henry Holt and Company, 1954

Buku Teks

Abel, Darrel, author

Barron's Educational Series, 1963

Buku Referensi

Compiled and edited by Dorothy Nyren Curley, Maurice Kramer, Elaine Fialka Kramer

Continuum, 1989

Buku Referensi

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