APA-čujuhus (7. p.)
Hoyle, F., & Hoyle, G. Seven Steps to the Sun. Fawcett Crest.
Chicago-čujuhus (17. p.)
Hoyle, Fred, juo Geoffrey Hoyle. Seven Steps to the Sun. Greenwich, EUA: Fawcett Crest.
MLA-čujuhus (9. p.)
Hoyle, Fred, juo Geoffrey Hoyle. Seven Steps to the Sun. Fawcett Crest.
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