Gaya APA

Heng, P. (2006). An appreciation of Ignatian spirituality & a glimpse of Jesuit spirituality. . Singapore: Singapore Ignatian Spirituality.

Gaya MLA

Heng, Philip. "An appreciation of Ignatian spirituality & a glimpse of Jesuit spirituality. ". Singapore: Singapore Ignatian Spirituality, 2006. Buku.