Cita APA (7a ed.)

BEER, T. (1906). BEER, Theodor APTÁHY Istvánhoz.

Cita Chicago Style (17a ed.)

BEER, Theodor. BEER, Theodor APTÁHY Istvánhoz. 1906.

Cita MLA (9a ed.)

BEER, Theodor. BEER, Theodor APTÁHY Istvánhoz. 1906.