APA (7th ed.) Citation

Griehl, M. (2012). Heinkel He 111: = The late variants H-6 to H-20 and Z. AirDOC.

Chicago Style (17th ed.) Citation

Griehl, Manfred. Heinkel He 111: = The Late Variants H-6 to H-20 and Z. Erlangen: AirDOC, 2012.

MLA (9th ed.) Citation

Griehl, Manfred. Heinkel He 111: = The Late Variants H-6 to H-20 and Z. AirDOC, 2012.