(1970). Horst Janssen: Picture Book ; A selection of 12 coloured drawings from the exhibition at Marlborough Fine Art (London). Marlborough Fine Art.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHorst Janssen: Picture Book ; A Selection of 12 Coloured Drawings from the Exhibition at Marlborough Fine Art (London). London: Marlborough Fine Art, 1970.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHorst Janssen: Picture Book ; A Selection of 12 Coloured Drawings from the Exhibition at Marlborough Fine Art (London). Marlborough Fine Art, 1970.
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