Cita APA (7a ed.)

Christiani & Nielsen. (1954). 50 years of civil engineering: 1904-1954. Egmont H. Petersen.

Cita Chicago Style (17a ed.)

Christiani & Nielsen. 50 Years of Civil Engineering: 1904-1954. Copenhagen: Egmont H. Petersen, 1954.

Cita MLA (8a ed.)

Christiani & Nielsen. 50 Years of Civil Engineering: 1904-1954. Egmont H. Petersen, 1954.