Gaya APA

Hoiberg, D, H., Levy, M. (2011). Britannica Global Edition. Volume 21 Normandy Invasion - Parameters . Chicago: .

Gaya MLA

Hoiberg, Dale, H.., Levy, Michael. "Britannica Global Edition. Volume 21 Normandy Invasion - Parameters". Chicago: , 2011. Ensiklopedia.