Gaya APA

Robertson, S., Coggle, , P. (2003). Parken verboten : German Verbs . : McGraw-Hill.New York.

Gaya MLA

Robertson, Silvia., Coggle, , Paul. "Parken verboten : German Verbs". : McGraw-Hill.New York, 2003. Skripsi, Tesis, Disertasi.