Enger, F. (1957). Letters for special occasions. Mc Graw Hill.
Chicago-čujuhus (17. p.)Enger, Frank. Letters for Special Occasions. New York: Mc Graw Hill, 1957.
MLA-čujuhus (9. p.)Enger, Frank. Letters for Special Occasions. Mc Graw Hill, 1957.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.