APA引文

Không rõ. (2007). Databases, Types, and the Relational Model. NOTNXB.

Trích dẫn kiểu Chicago

Không rõ. Databases, Types, and the Relational Model. NOTNXB, 2007.

MLA引文

Không rõ. Databases, Types, and the Relational Model. NOTNXB, 2007.

警告：這些引文格式不一定是100％准確.