JOHNSON SPENCER. (1987). ONE MINUTE FOR MYSELF: HOW TO MANAGE YOUR MOST VALUABLE ASSET. AVON BOOKS.
Chicago Style aipamenaJOHNSON SPENCER. ONE MINUTE FOR MYSELF: HOW TO MANAGE YOUR MOST VALUABLE ASSET. NEW YORK: AVON BOOKS, 1987.
MLA aipamenaJOHNSON SPENCER. ONE MINUTE FOR MYSELF: HOW TO MANAGE YOUR MOST VALUABLE ASSET. AVON BOOKS, 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.