¶«Ò°¹çÎá & ÕÔ½. (2020). ÐÅ: Letters. ±±¾©ÁªºÏ³ö°æ¹«Ë¾.
Chicago Style (17th ed.) Citation¶«Ò°¹çÎá i ÕÔ½. ÐÅ: Letters. ±±¾©ÁªºÏ³ö°æ¹«Ë¾, 2020.
Cita MLA¶«Ò°¹çÎá i ÕÔ½. ÐÅ: Letters. ±±¾©ÁªºÏ³ö°æ¹«Ë¾, 2020.
Atenció: Aquestes cites poden no estar 100% correctes.