Krombholz, M. G. (2004). Identifying German Chinas 1840s - 1930s. Hobby House Press.
Chicago-Zitierstil (17. Ausg.)Krombholz, Mary Gorham. Identifying German Chinas 1840s - 1930s. Grantsville, Maryland, USA: Hobby House Press, 2004.
MLA-Zitierstil (8. Ausg.)Krombholz, Mary Gorham. Identifying German Chinas 1840s - 1930s. Hobby House Press, 2004.
警告：這些引文格式不一定是100％准確.