Cicero, M. T. (1983). Cicero's essays on old age and on friendship: The original text reduced to the natural English order with a literal interlinear translation. Handy Book.
Čikaški stil citiranja (17. izdanje)Cicero, Marcus Tullius. Cicero's Essays on Old Age and on Friendship: The Original Text Reduced to the Natural English Order with a Literal Interlinear Translation. Harrisburg, Pa: Handy Book, 1983.
MLA način citiranja (9. izdanje)Cicero, Marcus Tullius. Cicero's Essays on Old Age and on Friendship: The Original Text Reduced to the Natural English Order with a Literal Interlinear Translation. Handy Book, 1983.
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