APA

Hendrik Groen, . (2019). On the Bright Side: The New Secret Diary of Hendrik Groen, 85 Years Old. New York: ، Grand Central Publishing.

Chicago

Hendrik Groen, . 2019. On the Bright Side: The New Secret Diary of Hendrik Groen, 85 Years Old. New York: ، Grand Central Publishing.

Harvard

Hendrik Groen, . (2019). On the Bright Side: The New Secret Diary of Hendrik Groen, 85 Years Old. New York: ، Grand Central Publishing.

MLA

Hendrik Groen, . On the Bright Side: The New Secret Diary of Hendrik Groen, 85 Years Old. New York: ، Grand Central Publishing. 2019.