György, P. (1899). PETROVAY György SCHÖNHERR Gyulához.
Chicagoスタイル(17版)引用形式György, PETROVAY. PETROVAY György SCHÖNHERR Gyulához. 1899.
MLA(9版)引用形式György, PETROVAY. PETROVAY György SCHÖNHERR Gyulához. 1899.
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APA(7版)引用形式