APA (7th ed.) Citation

Felber, H. L. (1989). The marriage of Urraca of Castile and Alfonso I of Aragon: An attempt at federal union of Christian Spain. UMI.

Chicago Style (17th ed.) Citation

Felber, Howard Lewis. The Marriage of Urraca of Castile and Alfonso I of Aragon: An Attempt at Federal Union of Christian Spain. Ann Arbor: UMI, 1989.

MLA (9th ed.) Citation

Felber, Howard Lewis. The Marriage of Urraca of Castile and Alfonso I of Aragon: An Attempt at Federal Union of Christian Spain. UMI, 1989.