/?/, P. D. PÁK Dienes /?/ WALTHERR Lászlóhoz.
Chicago Style (17th ed.) Citation/?/, PÁK Dienes. PÁK Dienes /?/ WALTHERR Lászlóhoz.
MLA (9th ed.) Citation/?/, PÁK Dienes. PÁK Dienes /?/ WALTHERR Lászlóhoz.
Warning: These citations may not always be 100% accurate.