Bennett, Patrick R. and Ann Biersteker and Waithira Gikonyo and Susan Hershberg and Joel Kamande and Carolyn Perez and Martha Swearingen (1985). Gĩkũyũ nĩ Kĩoigire: Aria-i na Aagĩkũyũ, p. 261. African Studies Program, University of Wisconsin-Madison.