APA (7th ed.) Citation

Hacker, W. (1917). Sei hart, mein Herz! Sächs. Heimatdichter-Verl.

Chicago Style (17th ed.) Citation

Hacker, Willy. Sei Hart, Mein Herz! Dresden-A: Sächs. Heimatdichter-Verl, 1917.

MLA (9th ed.) Citation

Hacker, Willy. Sei Hart, Mein Herz! Sächs. Heimatdichter-Verl, 1917.

Warning: These citations may not always be 100% accurate.