Gaya APA

HOLTZ, H., ZAHN, D. (2004). HOW TO SUCCEED AS AN INDEPENDENT CONSULTAN . United States of America: john Wiley and Sons,Inc.

Gaya MLA

HOLTZ, Herman., ZAHN, David. "HOW TO SUCCEED AS AN INDEPENDENT CONSULTAN". United States of America: john Wiley and Sons,Inc, 2004. Text.