Gaya APA
Stoken, D, A.
(1978).
Cycles What They Are, What they Mean, How to Profit by Them
.
London:
Mc. Graw- Hill, Inc.
Gaya MLA
Stoken, Dick, A.
"Cycles What They Are, What they Mean, How to Profit by Them".
London:
Mc. Graw- Hill, Inc,
1978.
.