Citazione APA

Kirst, H. H., & J. Maxwell Brownjohn. (1966). The 20th of July. Collins.

Stile di citazione Chicago

Kirst, Hans Hellmut, e J. Maxwell Brownjohn. The 20th of July. London: Collins, 1966.

Citazione MLA

Kirst, Hans Hellmut, e J. Maxwell Brownjohn. The 20th of July. Collins, 1966.