Gaya APA

HAIDUK, H, P. (1991). INTRUCTOR"S MANUAL AND KEY FOR INCREASING YOUR PRDUCTIVITY LOTUS 123 RELEASE 2.2 . : .

Gaya MLA

HAIDUK, H., PAUL.. "INTRUCTOR"S MANUAL AND KEY FOR INCREASING YOUR PRDUCTIVITY LOTUS 123 RELEASE 2.2". : , 1991. Buku.