APA

Hubbard (L.Ron), . (2007). The Problems of work (3 CDs). : .

Chicago

Hubbard (L.Ron), . 2007. The Problems of work (3 CDs). : .

Harvard

Hubbard (L.Ron), . (2007). The Problems of work (3 CDs). : .

MLA

Hubbard (L.Ron), . The Problems of work (3 CDs). : . 2007.