Wrigglesworth, J. S., & Wrigglesworth, H. (1969). Pehenayan ne riberu': First book : a primer in Ilianen Manobo. Summer Institute of Linguistic-Philippines.
Citazione stile Chigago Style (17a edizione)Wrigglesworth, Jean Shand, e Hazel Wrigglesworth. Pehenayan Ne Riberu': First Book : A Primer in Ilianen Manobo. [Manila]: Summer Institute of Linguistic-Philippines, 1969.
Citatione MLA (9a ed.)Wrigglesworth, Jean Shand, e Hazel Wrigglesworth. Pehenayan Ne Riberu': First Book : A Primer in Ilianen Manobo. Summer Institute of Linguistic-Philippines, 1969.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.