LHILIP LIET GROUP INC. (2016). SALES MIND 48 TOOLS TO HELP YOU SELL. PROFILE BOOKS.
Čikaški stil citiranja (17. izdanje)LHILIP LIET GROUP INC. SALES MIND 48 TOOLS TO HELP YOU SELL. GREAT BRITIAN: PROFILE BOOKS, 2016.
MLA način citiranja (9. izdanje)LHILIP LIET GROUP INC. SALES MIND 48 TOOLS TO HELP YOU SELL. PROFILE BOOKS, 2016.
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