APA (7th ed.) Citation

Langer, S. (2016). Zwanzig Sekunden Ewigkeit: Thriller. Siegfried Langer.

Chicago Style (17th ed.) Citation

Langer, Siegfried. Zwanzig Sekunden Ewigkeit: Thriller. Memmingen: Siegfried Langer, 2016.

MLA (9th ed.) Citation

Langer, Siegfried. Zwanzig Sekunden Ewigkeit: Thriller. Siegfried Langer, 2016.

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