APA-čujuhus (7. p.)
Haggblade, B., & Oliverio, M. E. Century 21 shorthand. South-Western Pub. Co..
Chicago-čujuhus (17. p.)
Haggblade, Berle, juo Mary Ellen Oliverio. Century 21 Shorthand. Cincinnati: South-Western Pub. Co..
MLA-čujuhus (9. p.)
Haggblade, Berle, juo Mary Ellen Oliverio. Century 21 Shorthand. South-Western Pub. Co..
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