APA (7th ed.) Citation

Killmayer, W., & Killmayer, W. (1960). Improv. 17.10.73. [Selbstverlag].

Chicago Style (17th ed.) Citation

Killmayer, Wilhelm, and Wilhelm Killmayer. Improv. 17.10.73. [München?]: [Selbstverlag], 1960.

MLA (9th ed.) Citation

Killmayer, Wilhelm, and Wilhelm Killmayer. Improv. 17.10.73. [Selbstverlag], 1960.

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