Dyfyniad APA

Butler, F. E. (1970). Signpost to the stars (4th ed.). George Philip.

Dyfyniad Arddull Chicago

Butler, F E. Signpost to the Stars. 4th ed. London: George Philip, 1970.

Dyfyniad MLA

Butler, F E. Signpost to the Stars. 4th ed. George Philip, 1970.

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