APA (7th ed.) Citation

Frey, H. pk000165: Der 1. Mai 1978 in Bologna.

Chicago Style (17th ed.) Citation

Frey, Harald. Pk000165: Der 1. Mai 1978 in Bologna.

MLA (8th ed.) Citation

Frey, Harald. Pk000165: Der 1. Mai 1978 in Bologna.

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