APA
Beliefnet (Firm), . (2007). Working with your guardian angel : an inspirational 12-week programme for finding your life's purpose. London: Piakus Books.
Chicago
Beliefnet (Firm), . 2007. Working with your guardian angel : an inspirational 12-week programme for finding your life's purpose. London: Piakus Books.
Harvard
Beliefnet (Firm), . (2007). Working with your guardian angel : an inspirational 12-week programme for finding your life's purpose. London: Piakus Books.
MLA
Beliefnet (Firm), . Working with your guardian angel : an inspirational 12-week programme for finding your life's purpose. London: Piakus Books. 2007.