Παραπομπή APA

Plutchak, T. S. (2000). Keep those cards and letters coming! Medical Library Association.

Παραπομπή Chicago Style

Plutchak, T. Scott. Keep Those Cards and Letters Coming! Medical Library Association, 2000.

Παραπομπή MLA

Plutchak, T. Scott. Keep Those Cards and Letters Coming! Medical Library Association, 2000.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.